Update example VS the revised example in the ESP core 2.+

[easytarget]

ESP just dropped changes to the standard example in the 2.0 ide preview.
Looks like they have added disabling face detection in the example as an option, and lamp control (wonder where they got that idea from..)
Probably a good idea to do a diff (+ unpack the html too) and see if any of their changes are worth importing or adopting.

[easytarget]

Ok; Analysis: Their html is still compressed and gzipped in the header files, sigh...
I still think that is piss-poor for an example, and totally unnecessary given the code space available on the esp32.

• They have added LED lamp control and face detection enable/disable via #defines.
• They have also added a mechanism for displaying and setting the camera's low-level registers <--- Interesting!
• There is a new control added for the Camera clock (xclck) <--- I recently tweaked this in my example, but they have actually made it into a configurable control. Not a bad idea..
• An additional camera module (ov5640) has been added, with a new index page. Some of the control handling has been tweaked to support this too.
• There is an option to grab a Bitmap (bmp) capture on /bmp, but I dont see this referenced in the html.
• A new button for 'set resolution' that actually passes a raw resolution+window setting to the camera module driver.
• Similarly a new button to 'set PLL' and it's options, whatever that is.
• Logging is done via the ESP_LOGI mechanism,Only very basic startup info is put out on the serial port.

[easytarget]

What I currently think about all this:

• I'm going to add xclck as an option, I like having that available.
  • The 'PLL' setting stuff might be good to do too
  • https://www.esp32.com/viewtopic.php?t=9201
• Maybe the register setting stuff too, depending on how easy it is to port.
• The bitmap capture may be to help with AI bots etc who expect a bitmap. I'll look at adding this if not difficult
• ov5640? Yes; depending on how much work it is
• I wont dick with logging, or the 'set resolution' stuff

When, and If I work on any of this rather depends on me having free time to do it.

[easytarget]

Actually, the set resolution function should be done as well as the others, it would not take any real extra effort to do at the same time, and has been requested in #173

[easytarget]

Actually, the set resolution function should be done as well as the others, it would not take any real extra effort to do at the same time, and has been requested in #173